How much longer until additional batteries are available to be purchased. It's been a while now and it's still out of stock.

Hello and good day. Thank you for reaching out and for the inquiry. We really admire you for being interested in DJI Products. With regards to your question. As of the moment, we don't have any timeframe yet when it will be released/in stock. If ever it will be posted on our Official online store at https://store.dji.com/?site=brandsite&from=nav. Thank you for your understanding and support.

On a separate battery note, how long should a battery last? On my old go-pro it used to last about an hour (i record my daily commute) on my first day of commuting it seemed to only last for about 30 minutes.